Question

Cos^-1(-1/2)+Cot^-1(sqrt3/3)??? help pleasee

Answer 1

i hate it when chrome bombs!!!

Answer 2

Do you know what \(\large cos^{-1}(\frac{-1}{2}) \) means?

Answer 3

isnt the same as 2pi/3?

Answer 4

yes....

Answer 5

how about the second term???

Answer 6

no i do not

Answer 7

\(\large y=cot^{-1}(\frac{\sqrt3}{3}) \rightarrow coty=\frac{\sqrt3}{3} \)...

Well... let's simplify that....

Answer 8

pi/4?

Answer 9

\(\large coty=\frac{\sqrt3}{3} \rightarrow tany=\frac{3}{\sqrt3}=\sqrt3 \)

Answer 10

do you use the unit circle?

Answer 11

yes

Answer 12

ok... tangent of what angle is square root of 3 ???

Answer 13

-60

Answer 14

noooo 120

Answer 15

i got 60 degrees... (or pi/3)...

Answer 16

nvm pi/3 is what my partner got

Answer 17

ok.. so add them up and you'll get your answer.... :)

Answer 18

thank you :)

Answer 19

yw...:)